'Declaration
 
Public Overloads Shared Sub AdjustContrast( _
   ByVal page As ImGearRasterPage, _
   ByVal contrast As Double, _
   ByVal brightness As Double, _
   ByVal gamma As Double _
) 

'Usage
 
Dim page As ImGearRasterPage
Dim contrast As Double
Dim brightness As Double
Dim gamma As Double
 
ImGearRasterProcessing.AdjustContrast(page, contrast, brightness, gamma)

public static void AdjustContrast( 
   ImGearRasterPage page,
   double contrast,
   double brightness,
   double gamma
)

public: static void AdjustContrast( 
   ImGearRasterPage* page,
   double contrast,
   double brightness,
   double gamma
) 

public:
static void AdjustContrast( 
   ImGearRasterPage^ page,
   double contrast,
   double brightness,
   double gamma
) 

Parameters

page

Image to adjust contrast.

contrast

Contrast value.

brightness

Brightness value.

gamma

Gamma value.

Average parameter range:

• Contrast: -2 ... +2 (negative means contrast inversion. In case of 1 no changes)
• Brightness: -128...+128
• Gamma: 0...10

Can be applied only to the raster pages with standard (non Run-Ends) DIB.

Method ImGearRasterProcessing.Verifier.CanApplyAdjustContrast (ImGearPage page) can be called to check whether the operation can be performed.

Reference